| 摘要 |
<p>Composite particles in which titanium oxide is inhibited from being discolored or decomposed by ultraviolet and from functioning as a photocatalyst by the action of ultraviolet and which have excellent resistance to hydrogen fluoride; a printing ink containing the composite particles; a coated resin film which has a coating film formed from the printing ink and is prevented over long from discoloring, changing in visible-light transmittance, and decreasing in mechanical strength; and a coating composition containing the composite particles. The composite particles each comprises, in the following order from the inner side, a particle comprising titanium oxide, a first coating layer comprising cerium oxide, and a second coating layer comprising silicon oxide. The amount of the cerium oxide is 3-30 parts by mass per 100 parts by mass of the titanium oxide, and that of the silicon oxide is 5-60 parts by mass per 100 parts by mass of the titanium oxide. The composite particles have an average particle diameter of 0.15-3 µm.</p> |
